[FFmpeg-user] How to change overlay parameter at runtime

[Michael Koch]

Am 27.03.2020 um 11:07 schrieb foxtail mega:
> Clarification regarding information (x,y for overlay filter).
>
> I am using ffmpeg for mobile devices so i am using flutter-ffmpeg. Now
> i am using dart language for supplying x and y co-ordinates to ffmpeg
> instance. Issue is, after i run the ffmpeg command, there is no way i
> am able to change the coordinates, so i have to stop running ffmpeg
> instance, and then re-run ffmpeg with changed coordinates.
>
> I guess i will check for suggested solution of realtime filter and
> sendcmd. I am not sure if that would work though.


A similar question was asked some time ago here:
http://ffmpeg.org/pipermail/ffmpeg-user/2019-August/045065.html

One of the suggested solutions was FFmpeg's zmq filter. But I never 
found a working example for it. If you figure out how it works, please 
write a short documentation and let me know.

Michael